Antiknock fitting



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j' pril 8, i958; I l A J. LuzYNm Pneu June 1s. 195s i `fitting disclosed in .Patent"'No. x3, 1956;; t

,f i reas toantilinock fittings, and primarily with an. improvement over the 12,742,928, dated March The present invention relates is concerned The pate-ntlis directed to an invention which is aimed primarily at theqproposition of eliminating knocking when a faucet is the common practice l coils which l'areheated, with the cold-water supply communicating with the intaheend of the'coil and hot water being drawn olf the outlet of the coil. Ordinarily, a faucet was connected to this outlet endiand it has been found that a knocking or hammering is created particularly irnmediately after the faucet is closed. Attempt has been made to eliminate this hammering, and the litting of the said patent is vbelieved to be generally satisfactory. However, it has been found that when the faucet is shut ot in a rapid or abrupt manner, a slight objectionable noise is present in the piping of a home. 7

With the foregoing conditions in mind, the present invention has in v of an improved-type of pressure expansion chamber which is designed to completely eliminate this undesirable knocking or noise regardless of how rapidly the faucet is shut otl. The improved pressure chamber is designed to acacommodate a very high peak back pressure.

A tting of' the type with which this invention is con earned ordinarily comprises a main chamber that includes a valve seat and a battle, the upper edge ot' the bathe being spaced from the valve seat. Directly below the valve seat there is an intake connection that is connected to the hot water coil. The casing extends outwardly from one side of the baiile and is provided with a connection to which a faucet is adapted to beconnected. The casing is'continned `up above the valve seat and at one side is formed with a ay-pass connection. Above this by-pass connection there is another connection to which the pressure cooperates with the valve seat is mounted in-a guide that is carried by the baille.

An, important object vide, in a fitting-of the 9 ber which consists essentially of a casing in which mounted a Sylphon-type bellows. This bellows communicates with the `asing above the valve seat., and is norin a collapsed condition by an expansion closed. As explained in this patent, itwasfv to provide hot water by utilizing iew as its foremost objective the provision stated as Athe description of and recirculated through the heating il.

Various other more detailed objects and advantages of in connecting with carrying in a practical embodiment, Will in part become apparent and in part be hereinafter.)

` the invention proceeds. 'y jf the invention, such as arise out the abovefnoted' ideas The invention therefore comprises an antiknock of the general type disclosed in the patent above idenY tiied but which includes chamber. This pressure is mountedvon the connection used for the pressure chamber in the patent, and type-bellows that is Springbiased,v together with appropriate meansfor guiding the spring action.

a novel and-improved pressure AFor a fullandu morecot'nplete understanding of the invention,-

reference may be had to the following description and accompanying drawings, wherein:

. Figure l is fa-.vertical fitting designed nventionand j Figr" 2 is a'vview "n side elevation, grammatic, showing the manner in which fitting is included in a hot-water circulatory system,

Referring now to the drawing, wherein like reference characters denote corresponding parts, ticularly to Figure 2, a heating coil is and referred to in its entirety by the reference character C. The coil'C includes an intake end at 10 and an outlet at 11. A cold-water supply -is represented at 12 and is connected o the intake 10, with a by-pass connection being indicated at 13. The fitting of this invention is referred to in its entirety by the reference character F and is connected to the upper end of the outlet 11.

Referring now more particularly F comprises a casing including a that is generally cylindrical and with which communicates an outwardly extending conduit 15 which terminates at a connection 16 to which a faucet or other suitable comparable device may be connected. Such a faucet is represented at 17 in Figure 2.

The upwardly extending main body portion 14 of the fitting F is formed with a .valve seat 18 immediately above the joinder of the conduit 15 thereon. A baile 19 is somewhat diashown as having its lower edge connected to the casingv v at the bottom of the conduit 15; and this baille 19 is ini clined over into the upwar with its upper edge being `A valve member 20 takes the form of a disc 'a stem 21 that is received in a guide 22 dly extending casing part 14,

valve having that is carried disc 20 is formed with an aperture 23 through which cold water is adapted to pass when the valve is in closed position. Y

The tting F is formed with a. connection at 24 to which the upper end. of the outlet 11 of the coil C is adapted to be connected, such as by being threaded therein in the 'manner illustrated in Figure I4 of the fitting F part 28 that is in- 29 carries a nipple 30 that ewe. into the extension 28. y cylindrical formation l'aving a bot-tom end wall 30 and an upper end wall 3'1 that chamber consists @fsa castagni which casing includes a Sylphon section through an antiknock accordance the precepts of this this antiknock f,

and first more par-Y therein illustrated i to Figure 1, the fittingV main body portion 14Y spaced from the valve seat 18. Y*

y extending poris formed with a cylindrical extension 32 that is co axial with the casing 29.

Positioned 'within the lower portion of the casing 294 Surrounding thepiston 37`is an expansion coil spring 39 lwhich bears against the-end wall 31 at one endv and the top wall 36 of the bellows 34 at theifother end. 'The normal tendency of the spring 39 is to urge the bellows ure 1. v Operation. .y

AWhile the mode of operation.offthe--antilnoclr fitting of this rinvention is believed to 'begobviotls from the illus- This piston 37 is formed with a longitudinally into the collapsed position depicted by' full lincstin Fig d. disc 2G is now seated, this water will be diverted bal to the by-pass 26 and around through the heating coif What actually takes place isy that, in place of the abru stop which ordinarily would he caused by aclosing the faucet, the water is recirculated back through t] by-pass, with the recirculation being spread over a loi interval by the bellows 34 and spring 39. Itis this a rangement of providing for a recirculation over a rel tively long period which completely eliminates all han meting or knocking which now actually takes ,place i installations of this type. Y ,t Y

While a preferred specific embodimentof the invei tion is h ereinbefore set forth, it is to be clearly 'understoc that the invention is not to be limited Vto 'the exact co1 structions, mechanisms, and devices illustrated 'and di scribed, because various modifications of thcsedetai may be provided in putting the invention into practic within the purview ofthe appended claim.

VWhatisclaimedis:` '5l In an antiknock fitting, a cylindrical casing having an it let and an outlet, a conduit near the inletof said Icasiu .outstanding laterally therefrom, a valve seat in said ca'sin tration of the drawing' and description of parts given, it .t

may be briefiyoutlined as follows:

' .Under normal conditions, that is, with the faucet 17 Iclosed, the valve disc' 20 will be seated on its seat 18. When the faucet 17 is opened, the spring39` will first tend to collapse the bellows 34 to the extent necessary to equal the pressure remaining in the pressure head in the line. Thus some water will be forced out of the bellows 34, which is accompanied by a partial collapse of the bellows. t

When the faucet 17 is opened, hot water will be dravm from the conduit 15. In order for this action to take place, the hot water must pass upwardly from the coil outlet 11 and 'around the upper edge of the bafiie 19 beneath the valve seat 18 and disc 20. As the hot water so passes, a small amount of cold water will be drawn through the aperture 23 and mixedwith the hot water.

When the faucet 17 is closed, a back pressure on the water in the line is immediately created. This back pressure is e'ective to at first raise the valve disc 20 from its seat 18. This permits hot water to pass upwardly through' the main body part 14 of the casing and into the interior of the bellows 34, thus causing an expansion of the bellows that is accompanied by a compression of lthe spring 39 and a compression of the airin the casing 29 above the bellows. This action is continued until the back pressure is completely dissipated.

it is evident, of course, that some of the back pressure will be diverted back to the by-pass 26, which will cause a recirculation of the water through the coil C. As the normal pressure in the line is graduallygrestored at the faucet 17, or more particularly in the conduit 15, the valve disc 20 will again be seated on its seat -18 due lto the tendency of the bellows vto collapse under vthe iuuence of the spring 39. This collapsing of the bellows will adjacent to the wall of said conduit nearest the outlet.,v vbaille having oneV end joined to the wall of said condu g adjacent to the inlet with the other end thereof bein inclined toward the center of said casing in adjacer spaced relation with said valve seat, a valve disc coopei ,f ating with said valve seat on the side thereof opposit kforce water outof the bellows and, inasmuch as the valve' j from said conduit, guide means for said valve disc, faucet connection at the free end of said conduit, a b) pass connection on said casing adjacent to the valve ses and valve disc on the outlet side thereof, a connectio for alpressure chamber in the outlet end of said casing a casing having upper and lower walls, said lower wai` being provided with a nipple attached to said connectie` for the pressure chamber and being otherwise imperfoi ate, said casing being formed with a cylindrical exten sion extending upwardly from said upper wall, a Sylphon type bellows in the lower part of said casing having a: inlet communicating with said nipple and an end wall a piston carried by said end wall and extending into sait extension, said piston being formed with a longitudinali extending groove communicating with the upper free ent thereof, and an expansion coil spring disposed about sait piston and engaging the end wall of said bellows and th uppet wall of said casing.

ReferencesCited in the tile of this patent UNITED srArns PATENTS 1,169,250 nunon im 25,1911 1,932,666 Hyatt oer. s1, 193: 2.198.021 wood Apr. 2s, 194| 2,273,766 Tower -a Feb. 17, 1941 2,742,923 Luzynsxi Apr. 24. 19st l FOREIGN PATEN'ts p t 988,559 Fran May 9, 1951 

